Convergence accommodation.
Convergence accommodation.
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DOI：
10.1364/josa.73.000332
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发表时间：
1983
影响因子：
--
通讯作者：
D. Kersten;G. Legge
中科院分区：
文献类型：
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作者：
D. Kersten;G. Legge
稳态调节反应被测量在双眼作为函数的会聚角和方向的横向凝视。测量是用双目激光验光仪进行的。小斑点图案被用作融合刺激在一个黑暗的领域。这些模式的优点是不会对调节产生模糊刺激。对于+32、-32和0度的横向凝视角度，测量了0到25度的会聚调节。双眼的平均调节与观察者调节范围内的会聚角呈线性相关，但与横向凝视角度无关。三名受试者的平均收敛调节/收敛比（以每米角屈光度计）为0.9。我们使用激光散斑靶的收敛调节测量与以前使用小瞳孔的研究非常一致。还测量了双眼观看斯奈伦图字母的适应反应。当亮度降低时，观察到夜间近视。趋同调节没有发现类似的效果。对模糊目标的调节与收敛调节密切相关。
Steady-state accommodation responses were measured in both eyes as a function of vergence angle and direction of lateral gaze. The measurements were made with a binocular laser optometer. Small speckle patterns were used as fusional stimuli in an otherwise dark field. These patterns have the advantage of providing no blur stimulus to accommodation. Convergence accommodation for vergence angles ranging from 0 to 25 deg was measured for lateral-gaze angles of +32, -32, and 0 deg. The average accommodation of the two eyes was linearly related to vergence angle over the observer's accommodation range but was independent of the angle of lateral gaze. The mean convergence accommodation/convergence ratio for three subjects, in diopters per meter-angle, was 0.9. Our measurements of convergence accommodation using laser-speckle targets are in good agreement with previous studies that used small pupils. Accommodation responses for binocular viewing of letters of a Snellen chart were also measured. When luminance was reduced, night myopia was observed. No similar effect was found for convergence accommodation. Accommodation to a dim target corresponded closely to the convergence accommodation.